Paper/Spigot-Server-Patches/0557-MC-197883-Bandaid-decode-issue.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 21 Aug 2020 21:05:28 -0400
Subject: [PATCH] MC-197883: Bandaid decode issue

Mojang has a mix of type and name in the data sets, but you can only
use one.

This will retry as name if type is asked for and not found.

diff --git a/src/main/java/com/mojang/serialization/codecs/KeyDispatchCodec.java b/src/main/java/com/mojang/serialization/codecs/KeyDispatchCodec.java
index de7d1e5e0319c65775d932144c268c2d55bb7dc7..bd6a0e1b5454e880a4f2a16be7dc8da64b73e11d 100644
--- a/src/main/java/com/mojang/serialization/codecs/KeyDispatchCodec.java
+++ b/src/main/java/com/mojang/serialization/codecs/KeyDispatchCodec.java
@@ -48,7 +48,12 @@ public class KeyDispatchCodec<K, V> extends MapCodec<V> {
 
     @Override
     public <T> DataResult<V> decode(final DynamicOps<T> ops, final MapLike<T> input) {
-        final T elementName = input.get(typeKey);
+        // Paper start - bandaid MC-197883
+        T elementName = input.get(typeKey);
+        if (elementName == null && "type".equals(typeKey)) {
+            elementName = input.get("name");
+        }
+        // Paper end
         if (elementName == null) {
             return DataResult.error("Input does not contain a key [" + typeKey + "]: " + input);
         }